Stay Cool in Summer. Warm in Winter.
Wall mounted split systems for Welsh homes, installed by a local team who understand heating, cooling and domestic energy properly. Single-room systems start from £1,500, with a free home survey to confirm the right fit.
Why More Welsh Homes Are Installing Air Conditioning
When people ask us about home air conditioning, it’s rarely because they want something flashy. It’s usually much more practical than that.
A bedroom gets too warm to sleep in. A loft room is lovely in spring but unbearable in July. A garden room used for work is too hot by mid-afternoon. Conservatories can swing from chilly to stifling, and hybrid working has made comfort at home matter more.
Most survey conversations start with one room that isn’t behaving. We look at the room size, insulation, sun exposure, outdoor unit position and how you actually use the space.
Comfort Without Cooling the Whole House
Cooling in Summer
Useful for bedrooms, loft rooms, offices and sunny spaces that hold heat long after the sun has moved round.
Heating in Winter
Modern split systems can also heat, which is handy for individual rooms that don’t need the whole central heating system on.
Quiet Operation
We’ll talk through noise levels during the survey, especially for bedrooms and neighbours near the outdoor condenser.
Smart Controls
Many systems include app control, timers and schedules, so you can cool or warm the room when you need it.
Efficient Room Control
Suitability depends on the room, but a well-sized system can help reduce reliance on traditional heating in suitable spaces.
Tidy Installation
Pipe routes, drainage and outdoor unit placement are planned before work starts. Small details matter in a lived-in home.
Final pricing depends on the room, access, pipe route, outdoor unit position and system choice. If you’re not sure whether one room or several rooms need a system, we’ll talk it through during a free home survey.
Heating in Winter
Cooling & Heating From One System
Modern wall mounted split systems are air-to-air heat pumps. Put simply, they can move heat out of a room in warm weather, then provide useful warmth when the temperature drops.
That makes them a good fit for individual rooms where comfort is difficult to manage, such as bedrooms, home offices, garden rooms and loft conversions.
You control the room you’re using, rather than changing the temperature of the whole house. Many systems also include simple smart controls, so you can set timers, adjust temperature and keep things comfortable without fuss.
What Is an Air-to-Air Heat Pump?
Most modern wall mounted air conditioning systems are air-to-air heat pumps. Instead of creating heat in the same way as a traditional electric heater, they move heat from one place to another.
In summer, the system removes unwanted heat from the room to help keep the space cool. In winter, the process is reversed, allowing the same wall mounted unit to provide warm air heating.
This makes air-to-air systems a practical option for bedrooms, home offices, garden rooms, loft conversions and living spaces where room-by-room comfort is important.
Helpful for rooms that hold heat into the evening.
Useful warmth for individual rooms when suitable.
Set the temperature in the space you’re actually using.
Use timers, schedules and app controls on many systems.
Rooms We’re Commonly Asked About
Bedrooms
For hot nights and better sleep in summer.
Home Offices
For people working from rooms that heat up quickly.
Garden Rooms
For year-round use without relying on plug-in heaters.
Loft Conversions
For rooms under the roof that trap heat.
Conservatories
For spaces that change temperature quickly.
Living Rooms
For targeted comfort in the room used most.
Have one awkward room that never feels right? Tell us about it and we’ll advise honestly.
Single Split and Multi-Split Systems
Some homes only need one problem room sorted. Others need better control in several spaces. The right setup depends on the room size, insulation, layout, outdoor unit location and how you use the room day to day.
We talk this through during the survey, including where the outdoor condenser could go and how the pipework can be kept neat.
Single Split System
One indoor unit connected to one outdoor unit. Ideal for bedrooms, garden rooms, loft rooms and home offices.
Multi-Split System
Multiple indoor units connected to one outdoor unit. Useful when several rooms need individual temperature control.
Installing Home Air Conditioning Across South Wales
We work with homeowners across South Wales, from coastal properties to older terraces, newer estates and rural homes. Every property is a little different, so local knowledge helps.
Swansea
Home air conditioning installations in Swansea are often about bedrooms, garden rooms and home offices that get strong afternoon sun.
Cardiff
Cardiff homes can vary from flats and townhouses to larger family homes, so careful outdoor unit planning matters.
Llanelli
Wall mounted systems for homes in Neath and Llanelli are commonly chosen for bedrooms, loft rooms and work spaces that need better summer comfort.
Carmarthen
We advise on air-to-air heat pump systems across Cardiff and Carmarthen, with insulation, room layout and pipe routes all part of the design conversation.
Neath
For homes in Neath, we often talk through noise, outdoor condenser location and whether one room or several rooms should be covered.
Across South Wales
From Swansea and Neath to Llanelli, Cardiff and Carmarthen, we’ll give honest advice on whether a room-by-room system is the right fit.
We install across South Wales. Share your postcode and the room you’re thinking about.
A Renewable Energy Team, Not Just an Air Con Installer
Celtic Green Energie works with Welsh homeowners on solar panels, battery storage, EV chargers and heat pumps. Air conditioning sits naturally alongside that work because modern split systems are part of home electrification.
Homeowners with solar panels may also want advice on how daytime solar generation can support electric heating and cooling systems. We can look at this alongside battery storage, heat pumps and EV chargers during the same conversation.
If you’re comparing options or just want a practical second opinion, you can contact our team before booking a survey.
We’ll give you straightforward advice, explain the limits as well as the benefits, and install with respect for your home.
- Local Welsh company with domestic energy experience.
- Qualified installers and F-Gas certified installation where required.
- Free home surveys before recommending a system.
- Advice on planning checks for listed buildings, flats, conservation areas and unusual outdoor unit locations.
- Clear discussion of noise levels, pipe routes and condenser placement.
Professionally Installed Across South Wales
Every installation is designed around the room, the property layout and how the homeowner uses the space. During a survey we look at airflow, wall position, pipe routes, electrics, outdoor condenser location and the rooms nearby.
Indoor Unit Installation
Neat installation of a wall mounted air-to-air unit with careful attention to placement, pipework and finish.
Finished Bedroom System
Quiet cooling and heating for rooms that become uncomfortable during warmer months.
Garden Room Comfort
Heating and cooling for garden offices, gyms and hobby rooms used throughout the year.
Outdoor Condenser Placement
External units positioned with consideration for access, noise, appearance and airflow.
System Handover
We explain how to use the controls before we leave, including heating, cooling and smart settings.
Home Office Installation
Room-by-room comfort for hybrid working and everyday use.
What Homeowners Say
Real feedback helps homeowners understand what to expect from survey to installation. These examples are included as placeholders and should be replaced with verified customer reviews before final publication.
“Our loft bedroom was uncomfortable during warmer weather. The team recommended the right wall mounted system and the difference has been noticeable straight away. It’s also useful for heating the room in winter.”
Sarah, Swansea
“The installation was clean and tidy, and everything was explained clearly before the team left. The unit is much quieter than we expected.”
Mark, Cardiff
“We had a system fitted in our garden office so we could use it properly all year round. It now feels like a proper part of the home.”
Helen, Carmarthen
Want the same kind of practical advice before choosing a system?
Trusted Wall Mounted System Brands
We can advise on suitable wall mounted systems from recognised heating and cooling manufacturers, depending on the room, property and budget.
Why Homeowners Choose Celtic Green Energie
We bring the same practical approach to home air conditioning that we use across renewable energy projects. The advice is based on the room, the property and whether the system is genuinely suitable.
What Happens Next?
Free Home Survey
Tell us which room is causing the issue and we’ll arrange a suitable time to visit.
Room & Property Assessment
We check the room, insulation, layout, access and possible outdoor unit positions.
System Recommendation
You’ll get a clear recommendation and quote. Single-room systems start from £1,500, depending on the installation.
Professional Installation
Qualified engineers install the system neatly, with attention to pipe routes and finish.
System Demonstration & Support
We show you how to use cooling, heating and smart controls before we leave.
Book a Free Home Survey
Tell us which room is causing trouble and we’ll come back with practical advice. Single-room systems start from £1,500, and we’ll confirm the right price after checking the room, outdoor unit position and whether a single split or multi-split system makes sense.
- Suitable for bedrooms, offices, garden rooms and loft spaces.
- Installed by qualified engineers.
- F-Gas certified installation where required.
Want to Know if It’s Right for Your Room?
Book a Free Home Survey and we’ll look at the room, the outdoor unit position and the best system type for your property. If it’s not the right fit, we’ll say so.
Recent Home Comfort Projects
As we complete more air-to-air installations across South Wales, we’ll use this section to share real examples of bedroom, garden room, home office and loft conversion projects.
Swansea
Bedroom Cooling Installation
A bedroom-focused installation designed to improve comfort during warmer months and provide useful winter heating.
Neath
Garden Room Heating & Cooling
A wall mounted system selected to help make a detached garden room usable throughout the year.
Llanelli
Home Office Comfort System
A room-by-room solution for a home workspace where steady temperature control matters during the working day.
Air Conditioning FAQs
These are the questions we’d expect during a home survey. If you’re comparing options, you may also want to read about heat pumps, solar PV or battery storage.
How much does home air conditioning cost?
Single-room wall mounted systems start from £1,500. The final price depends on the room size, system type, access, pipe route and outdoor condenser position. A straightforward single-room installation will usually be less involved than a multi-room system. We’ll confirm the right specification after a survey.
Can air conditioning heat a room?
Yes. Many wall mounted split systems use air-to-air heat pump technology, so they can cool in summer and heat in cooler months. They’re best thought of as room-by-room comfort systems rather than a replacement for every heating setup.
Is it expensive to run?
Running costs depend on the system, electricity tariff, room size, insulation and how you use it. We won’t promise exact savings without the details. In suitable rooms, efficient split systems can help reduce reliance on traditional heating.
Do I need planning permission?
For many standard domestic installations, planning permission is usually not required. Checks may be needed for listed buildings, flats, conservation areas or unusual external unit placements. We’ll flag this during the survey if it applies.
Is air conditioning suitable for bedrooms?
Often, yes. Bedrooms are one of the most common reasons people contact us. We’ll look at noise levels, unit position and airflow so the system is comfortable at night.
Are wall mounted units noisy?
Good quality indoor units are designed to run quietly, especially on lower fan settings. The outdoor condenser also needs sensible placement, so we consider neighbours, walls, patios and bedroom windows when planning the job.
How long does installation take?
Many single-room installations can be completed within a day, but access, electrics, pipework and wall construction can affect timings. We’ll give you a realistic view before booking the work.
Can one outdoor unit run more than one room?
Yes, with a multi-split system. It’s useful where you want several indoor units but fewer outdoor units. It does need proper design, so we’ll check capacity and pipe runs carefully.
Still weighing it up? Ask us about the room, the outdoor unit position and whether air-to-air heating and cooling makes sense for your home.